Incandescent oil-lamp.



Patented Oct. 23, I900.

".1. c. 0. HEAD.

INCANDESCENT UIL LAMP.

(Application filed Dec. 2,1899.)

(010 Model.)-

mt'. NORRIS PETER; ooi, PMOTQUTHQ. WASHNGTON, u. c.

UNITED STATES.

PATENT OFFICE.

JOHN CHARLES CRAMPIN READ, OF LONDON ENGLAND.

INCANDE SCENT OIL- LAMP.

SPECIFICATION forming part of Letters Patent No. 660,311, dated October 23, 1900.

- Application filed December 2,1899. Serial No. 738,999. N m del.

To all whom it may concern.-

Be it known that I, JOHN CHARLES GRAM- PIN READ, a subject of the Queen of Great Britain, residing at 4 Steeles road, Haver' stock Hill, London, England, have in vented new and useful Improvements in Incandes cent Oil-Lamps, of which the following is a specification.

My invention relates to oil-lamps of'the kind wherein a mantle is madeuse of, designed to be rendered incandescent by means of a flame similar to the flame of a Bunsen gas-burner. siderable difficulties in obtaining the required kind of flame. The object of .my invention. is to provide means whereby this flame can be obtained with greater certainty than heretofore; and to this end it consists, mainly, in the use of a novel form of spreader, whereby the air is delivered to the flame at diflerent points in the manner hereinafter described.

The invention also comprises the arrangement, in combination with the wick-tubes, of aguide-tube which insures that the wick shall rise uniformly at all parts.

To enable my invention to be fully understood, I will describe the same by reference to the accompanying drawings, in which- Figure 1 is a vertical section of a lampburner-provided with myimprovements. Fig.

2 is an elevation of the guide-tube which I.

make use of in conjunction with the wick, and Fig. 3 is a plan of the same. Fig. 4 is a sectional view of my improved spreader slightly modified, and Fig. 5 is a plan view of the said spreader with the upper part removed. Figs. 6 and 7 are views similar to Figs. 4 and 5, respectively, illustrating a slight modification'of the spreader; and Figs. 8, 9, and 10 are views similar to Fig. 4, illustrating further modifications. Fig: 11 is a detail sectional view of the stud .or baffle.

Similar letters of reference'indicate corresponding parts in the several figures.

a is the body of the burner; b, the chimneygallery; I), the chimney; c, the inner wick tube, and d the outer wick-tube, these wicktubes being arranged in a well-known mannor to receive a flat wick and curve it into a round wick at the top of the wick-tubes.

e is my improved spreader, an essential feature of which is that it is formed with a Hitherto there have beencon than the area of the lower tubular portion jof the spreader, so that a part of the air-current which passes up through the tubej will be compelled to escape through the openings g g in the neck, the other portion passing on into the cap of the spreader and partly escaping through the openings 71 therein. The spreaderis inserted intothe central Wicktube 0 in such a manner that the openings 9 g are adjacent. to the top of the wick. It will thus be understood that'the portion of the air which escapes through the said openings 9 9 will come into contact with the flame immediately above the wick, while the remainder which passes into the cap will come into contact with the flame at some distance above the wick, the result being that the required blue flame for rendering the mantle incandescent can be obtained. The opening '2: through the neck has a baffle arranged in connection with it-such, for instance, as a stud 7{)SO as to deflect a portion of the air-current passing through the said neck onto the perforations h h. This stud is also perforated longitudinally, so that a portion of the air passes up through it into the space inside the mantle where it comes into contact with the flame. This baffle is preferably in the form of a perforated cap spun or otherwise attached to the lower end of the stud, as shown in the drawings. In Fi 1 the under side of the cap is shown solid; but in Figs. 4 and 5 the under side is formed with perforations Z Z.

As shown in Fig. 6, the openings g g, instead of being arranged vertically, as in Figs. 1 and 4, are arranged horizontally and the openings Z Z in the base of the cap are elongated, the metal which is cut out to form the said openings being pressed upward, so as to form lonvers. In Fig. 8 the two lower rows of openings 72. h, instead of being circular perforations,- are elongated and are provided with louvers, the base of p the cap is not performed, and the openings g g are formed as in Figs. 1 and 4.

In Fig. 9 the cap of the I spreader is formed with the openings h h, as shown in Fig.8, the base of the cap with openings Z Z, similar to'those shown in Figs. 6 and 7, but arranged to deflect the air in the opposite direction, and the openings g g, also as shown in Fig. 6. In Fig. 10 the openings h h are formed horizontally, but without louvers, while the openings Z Z and g g are similar to those shown in Fig. 6.

m is the guide-tube for the wick. This tube is made to slide on the outside of the inner tube 0 and is provided at the upper end with a series of points or projections an and on the side where the two edges of the wick are :5 brought together with other projections 0 0,

adjusting device, which, as shown, is in the form of a rack and pinion, the said rack being attached to a plate pat'the lower part of the tube m, Fig. 1. In order to permit of applying the wick to this guide-tube m, the upper part of'the outer wick-tube is made removable, so as to permit of the wick being wrapped around the guide-tube m, the said upper part being then placed as shown in Fig. l.

q is a cap which I advantageously place upon the top of the chimney b, the said cap being in the form of a perforated ring. This cap is for the purpose of maintaining the flame steady under variations in the external aircurrents.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In an incandescent oil-burner, the com- Nth bination with the central wicktube, of a hollowspreader having a lower tubular portion engaging said wick-tube, a contracted neck above said lower portion provided with lateral apertures, a cap or chamber above said neck broader than the said contracted neck, provided with a closed top and having lateral discharge-apertures and a baflie secured to the top of said cap provided with ports communicating with a central opening in said baffle, and projecting downward into said cap or chamber to a point adjacent to said contracted neck, substantially as described.

2. In an incandescent oil-burner, the combination with the central wick-tube, of a hollow spreader having a lower tubular portion engaging said wick-tube, a contracted neck above said lower portion provided with lateral apertures, a cap or chamber above said neck broader than the said contracted neck, provided with a closed top, and having lateral discharge-apertm'es, and a baffle consisting of a hollow stud extending through the top' of said cap, and projecting downward therefrom to a point in said cap just above said contracted neck, whereby the current of air ascending through the wick-tube and the lower tubular part of the spreader will be forced by said contracted neck to divide, part escaping through the apertures in said neck, the rest ascending and being forced by said stud or bafile to divide, part passing through said stud and part escaping through the lateral walls of the cap, substantially as described.

JOHN OlIAlthES CRAMPIN ItllAl).

YVitnesses:

JOHN E. BoUsFInLD, C. G. REDFERN. 

